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Repro Exam #2 > Placentation > Flashcards

Placentation Flashcards

1
Q

Placental Types - Chorionic Villi:
Chorionic villi uniformly distributed across entire surface of chorion

A

Diffuse

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2
Q

Placental Types - Chorionic Villi:
Formation of specific zone of chorionic villi

A

Zonary

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3
Q

Placental Types - Chorionic Villi:
Discrete, disc-like zone

A

Discoid (common in primates)

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4
Q

Placental Types - Chorionic Villi:
“Button-like” structure

A

Cotyledonary

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5
Q

The Sow and the Mare are examples of what type of placentation?

A

Diffuse

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6
Q

What species have epitheliochorial?

A

Sow, Mares, Ruminants

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7
Q

What “layer is not present” in Endotheliochorial?

A

Endometrial epithelium

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8
Q

What species have Endotheliochorial?

A

Dogs and Cats

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9
Q

What species have Hemochorial?

A

Primates and rodents

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10
Q

What is left in Hemochorial?

A

Chorionic epithelium
Chorionic interstitium
Chorionic capillaries

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11
Q

Name the layers that separate fetal and maternal blood:

A

Maternal endothelium
Maternal interstitium
Maternal epithelium
Fetal epithelium (trophoblasts)
Fetal interstitium
Fetal endothelium

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12
Q

Match the species with the placental type:
Zonary

A

Canines and Felines

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13
Q

Match the species with the placental type:
Cotyledonary

A

Ruminants
- Cattle, Sheep and Goats

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14
Q

Match the following with the placental type:
Single zone for placental exchange

A

Discoid

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15
Q

What placentation distribution corresponds to a species that Implants into the endometrium?

A

Discoid

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16
Q

What structure contains fluid that the fetus directly swallows and inhales in utero?

A

Amniotic cavity

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17
Q

Match the following with the placental type:
Chorionic villi are distributed evenly across the endometrium

A

Diffuse

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18
Q

Which species has an Epitheliochorial?

A

Mares

19
Q

Which species has a Synepitheliochorial or Syndesmochorial?

A

Ruminant

20
Q

Which species has Endotheliochorial?

A

Felines and Canines

21
Q

Which species has Hemochorial?

A

Primates and rodents

22
Q

What materials can cross the placental barrier?

A
  • Vitamins
  • Glucose
  • Small molecular weight hormones
  • Some toxic materials
  • Some microorganisms
  • Some teratogenic materials
23
Q

(T/F) Fetal stress initiates a cascade of events of parturition

A

True

24
Q

What is the function of the following hormone?
ACTH

A

initiates parturition cascade of events

25
Q

What is the function of the following hormone?
Estradiol

A

increased secretion of mucus

26
Q

What is the function of the following hormone?
Oxytocin

A

secretion stimulated by increased pressure on cervix by fetus

27
Q

What is the function of the following hormone?
Prostaglandin F2alpha

A

Promotes secretion of relaxin

28
Q

Hormones from the placenta have which functions?

A
  • Stimulate ovarian function
  • Maintain pregnancy
  • Stimulate fetal growth
  • Stimulate mammary function
  • Facilitate parturition
29
Q

Maternal Hemorrhage and necrosis

A

pigmented zone

30
Q

Microcotyledons

A

mare

31
Q

Glycogen plaques

A

cotyledonary placenta

32
Q

live birth

A

vivparous

33
Q

egg laying

A

oviparous

34
Q

Organ of fetal exchange of nutrients and metabolic wastes

A

Placenta

35
Q

Blastocyst embeds in endometrium before placental development

A

implantation

36
Q

mammals with a placenta

A

Eutherian

37
Q

Semipermanent relationship between fetal extraembryonic membranes and maternal placenta

A

attachment

38
Q

Can be detected in blood and urine at 8-10 days of gestation

A

hCG

39
Q

Promotes fetal growth and stimulates mammary function

A

placental lactogen

40
Q

PSBP

A

Binucleate giant cells

41
Q

Helps stretch pelvic ligaments

A

relaxin

42
Q

How many layers does the Endotheliochorial placenta have?

A

Five layers

43
Q

How many layers does the Epitheliochorial placenta have?

A

Six layers

Repro Exam #2 (19 decks)

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